Х^6-12x^4+48x²-16-48=0
x^6-12x^4+48x²-64=0
(x^6-64)-12x²(x²-4)=0
(x²)³-(4)³-12x²(x²-4)=0
(x²-4)(x^4+4x²+16)-12x²(x²-4)=0
(x²-4)(x^4+4x²+16-12x²)=0
(x²-4)(x^4-8x²+16)=0
(x²-4)(x²-4)²=0 (x²-4)³=0 ⇒ x²-4=0 (x-2)(x+2)=0
x-2=0 x=2
x+2=0 x=-2
Ответ: х1=2 х2=-2